/*
 * Copyright 2012-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.demo.web.view;

import com.samskivert.mustache.Mustache;
import com.samskivert.mustache.Mustache.Compiler;
import org.springframework.web.reactive.result.view.AbstractUrlBasedView;
import org.springframework.web.reactive.result.view.UrlBasedViewResolver;

/**
 * Spring WebFlux [ViewResolver] for Mustache.
 *
 * @author Brian Clozel
 * @author Sebastien Deleuze
 */
public class MustacheViewResolver extends UrlBasedViewResolver {

    private final Compiler compiler;

    private String charset;

    /**
     * Create a {@code MustacheViewResolver} backed by a default instance of a
     * {@link Compiler}.
     */
    public MustacheViewResolver() {
        this.compiler = Mustache.compiler();
        setViewClass(requiredViewClass());
    }

    /**
     * Create a {@code MustacheViewResolver} backed by a custom instance of a
     * {@link Compiler}.
     *
     * @param compiler the Mustache compiler used to compile templates
     */
    public MustacheViewResolver(Compiler compiler) {
        this.compiler = compiler;
        setViewClass(requiredViewClass());
    }

    /**
     * Set the charset.
     *
     * @param charset the charset
     */
    public void setCharset(String charset) {
        this.charset = charset;
    }

    @Override
    protected Class<?> requiredViewClass() {
        return MustacheView.class;
    }

    @Override
    protected AbstractUrlBasedView createView(String viewName) {
        MustacheView view = (MustacheView) super.createView(viewName);
        view.setCompiler(this.compiler);
        view.setCharset(this.charset);
        return view;
    }

}